According to this article, http://www.standardista.com/css3/font-face-browser-support IE supports @font-face but I couldn\'t find any site which has valid custo
Yes they do starting with IE6*. A working example.
The font must follow some special rules though, for example the font name must begin with the family name and the family-name in the CSS must match the family name of the font.
If you use the font squirrel webfont generator to generate an .eot from a .ttf, it will ensure the generated .eot is usable on IE6.
* Beware that there are aliasing issues with custom fonts rendering in IE6/7/8.